Dental plugger.



W. F. GUBITZ. DENTAL PLUGGBB.. APPLIGATION FILED 111111.12, 1910.

1,001,638. Patented Aug. 29, 1911.

ii'omey.

cULUMuIA PLANuma/u'u co.. WASHINGTON. l1. c.

WILLIAM F. GUBITZ. OF HARTFORD, CONNECTICUT.

DENTAL PLUGGER.

Specification of Letters Patent.

L atented Aug. 2t), 1S). 1.

Application tiled February 12, 1910. Serial No. 543.1125.

.To all', wlw/m t may concern:

strike the blow. 'lhis nut has opposit'el'v dis Be it known that l,ll'ualmu lt`. (iunrrz, :1 j posed projections Il() which pass throughcitizen oit the United States, and :1 resident ot' l'lartlord, in thecount)v of iliart'lord and State ot' Connecticut, have invented certainnew and usetful Improvements in Dental Vlluggf'ers, otl which the'Followingis a specitication.

My invention is illustratet'l and described in connection with its useon a dental plugger and is an improvement upon the strueture illustratedand described in United ritates YPatent No. 916,258?, issued March 2?),1905 to ll'illiam (i. Church. 4

l`he invention relates particularly to tools such'as are described insaid patent tor strikinfy a number' o't successive blows and theimprovement relates partieularlj7 to a mechanism by means ot which thenumber ot blows to be struck can be varied between 1 maximum andminimum,

Figure l ls a side view ot a tool embodying my invention, with part otthe c: s-

ing` shown in section. VFig. 2 is a central seci Fig. 3 is a sectionalinc' lever '13 farrvine a fiawl l-l; snincl :s A rs n pressed in onedirection b v a spring` (not shown)l` which normally holds it 1n enigagemeut with a rack lo secured to the caso L all substantially asdescribed in the lbove-mentioiled patent.

A spindle 2 extends entirely through the rase, its opposite end beingprovided wlth a socket to receive a tool. Mounted on the spindle is ahammer 't8 which rests on an en largement il?) on the spindle againstwhich the blow delivered. This hammer also has a part 20 which liesagainst one end ot the lever 1t) and by means ol which the hammer r israised as the pawl engages the teeth ot 'the t rack. YWithin the upperend ot' the case is .secured a nutl Q5 between which and the` hammer A1Sis located a spring 2G which is put under compression as the hammer israised by the lever A13 and which, when the, hammer is released b v thepawl '114i passingl b v a tooth of the rack, throws the hammer againstthe projection on the spindle to slots :31 in the upper end olA thecase, the outer surl'aces otl these projections being,v screw-threadedto engage an internally threaded sleeve $12. When the sleeve is rotatedthe nut is held against rotary movement and so moves longrittulinallj'ot` the case to varj' the amount olE compression to which the spring' issubjected and therefore the lorce oll the blow olE the hammer on thespindle.

'the mechanism bj means ol which the number ot blows is varied comprisesa hub Il?) secured to the spindle aml having on its upper end a seriesoll steps Bti, 25T: 23S, Vif), and a cap lt) threaded into the end o'lEthe rasing and in which is rotarily mounted a stop -l-l. 'l`hc cap has aperipheral slot AlL through which extends a pin lil connected with saidstop and b v m =ans ot which it -an be turned. liv movine' said stop toits extreme leftt hand position the maximum amount ot endwise movementot the spindle is permitted and tour blows are delivered: moving` thestop to the right so that itV overlics the second step 21T th:` amountot longitudinal movement of the spindle is decreased slightlyv so thatbut j three blows are delivered; by moving the stop to the next step tothe rlght but two blowsI are delivered; and movement of the stop to itsextreme right hand position permits ol' but a single blow. Thisconstruetion while extrcmcljY simple permits the operator to var v thenumber oil: blows delivered bv the hammer to the spindle to suit the varviner conditions oil? the work under which the tool is used so that insome parts ot the oper: tion more rapid work can be accomplished by theuse ol llour blows, while. in the finishingl stages a tower number otblows can be utilized; and also the compression ot the spring can bevaried to strike a heavier or lighter blow.

i. am aware that the invention which has been herein illustrated anddescribed in one ol its emlnnliments can be changed in itsconz-:truction and adaptation.

l claim IA l. ln a dental plunger the combination with a easing' aml atool carrying spindle mounted therein` o'lE mechanism whereby said toolis "aused to strike a series o'ti blows` and means comprising' a rotar)Tstem mounted in the using and step devices on said spindle cope 'atingtherewith whereby llO the number of bloWs may be varied and limited.

2. ln a dental plugger of the character described the combination With acasing, a tool carrying spindle mounted therein, and means including a.hammer, actuating spring and tripping device whereby said tool is causedto strike a series of blows, of a hub on said spindle and having aseries of steps, and a rotarily mounted Stop constructed for engagementWith said steps.

3. In a dental plugger of the character described the combination Withthe ease, a longitudinally movable tool carrying spindle, alongitudinally movable hammer also mounted therein, and means includinga tripping device for causing said hammer to deliver a series of blovvson said spindle, of a. hub secured on said spindle and having one ormore steps on its upper end, a cap secured to said case, a stop rotarilymounted in said cap and located in operative relation to and adapted forcoperation With the steps on said hub.

WILLIAM F. GUBITZ. Witnesses D. l. KREIMENDAHL, H. E. HART.

Copies-of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

